Improved mercurial regulator for vulcanizing and other heaters



J. B. COOLIDGE.

Gas Regulator.

No; 97,052. Patented Nov: 23, 1869.

N-FETERS, PHOYO-UTHQGRAPMER. wnsumemu. o C

dint-tell JOHN B.COOLIDGE, OF BOSTON, MASSACHUSETTS.

Letters Patent N 97,052, dated November 23, 1869.

IMPROVED MERCURIAL REGULATOR FOR V'ULCANIZING- AND OTHER HEATERS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern Be it known that 1, JOHN B. 000mm: E, ofBoston, in the county of Suffolk, and State of 1\'[assachusetts, haveinvented a new and useful Mercurial Gas-Regulator for Regulating theHeat in Vulcanizers or Ovens, &c.; and I hereby declare that thefollowing is a full and exact description of the invention, andref'ci'cnce is hereby made to the accompanying drawings, and to theletters of reference, making a part of thisspecitication.

Figure 1 is a perspective view of the mercurial gasregulator, withdotted lines to show the top of the vulcanizer and the thermometer, &c.,and

Figure 2 is a section of the regulator.

The letter A represents the cover or top of the vulcanizer;

B, the thermometer;

U, the regulator;

(1, its bulb;

b, a tube connected therewith;

c, a metallic connection;

(I, the packing-box;

e, adjustable inlet-tube;

j; the outlet-tube;

'i, the extra vent;

s, the tip of pipe e,- and m, the mercury.

The nature of the invention consists in the use of a device, consistingof a bulb and tube, containing mercury, set in the top, or anyconvenient place, of an oven or vulcanizcr, the bulb being within theoven or vulcanizcr, under which is placed a gas-burner, fed by gasflowing into and out of a tube connected with the burner.

The gas-burner heats the oven or vulcanizcr, and, at the same time,heats the bulb of the regulator, causing the mercury to rise, byexpansion, in the tube, toward the cut-off or end of the inlet-tube.

The heatof the oven or vulcanizcr also causes the mercury to rise in thethermometer, the bulb of which is placed within the top of the oven orvulcanizer.

When the thermometer indicates 310 l ahrcnhcit, or any required dcgreeof heat, an adjustable inlett-ube is brought down to the mercury, which(liminishcs the amount of gas flowing to the burner, but the flame docsnot go out, lacing fed from an extra vent in the inlet-pipe; and thusthe heat very soon settles at the required degree, and will remain therestcadily'and evenly as long as rcquircd.

The use of the invention is to regulate the heat used in vulcanizingrubber, or other elastic gun], used in dentistry for forming the palateand gums, or other parts, in which teeth are set, or with which teethare connected; also, to regulate the heat of ovens or chamhers, whereuniform heat is'required, as in regulating watches, 850.; also, intesting the thcrn'lomcter connected with the oven or vulcanizer.

The description of the device is as tollows:

The letter A represents the top of a vulcanizcr, made of metal, or othersuitable n'latcrial. I

B is the thcrnmmeter, the bulb of which is within the oven.

n is the bulb of the regulator, extending into the oven or vulcanizer,containing the mercury.

To the bulb, extended, is fastened a tube, b, having a metallic top,upon which is screwed the connect-ingpiece 0, and to thisconuccting-picce is scrcwed the packing-box (1.

Through d c, into the tube I, passes the inlet-pipe 0, having an iron,lass, or porcelain tip, s, in which, also, is the extra vcnt' i.

The inlet-pipe e is connected with illuminating-gas, which flows throughthe pipe into the tube I), and, meeting the mercury, rises and flowsthrough the outlet-pipef to the burner connected with the other end ofthe same.

To use the device, place the material within the vulcanizer, the samebeing over the burner, and turn on the gas. It flows to the burner, asabove described. The heat will soon cause the mercury to rise in thethermometer and regulator. \Vhen the theru'lometer indicates the degreerequired, lower the adjustable pipe 6 till the tip s touches themercury, and the heat will be regulated, so as to hold the temperaturein the vulcanizer at the degree required, and as long as needed, withoutany care or attention,

The tube 1) may be graduz'ited at any point, so that the adjustable pipemay be set with its cut-oft at any degree, and in this way the tube,graduated, will become a test for the accuracy of the thermometer.

Vulcanizing dental rubber rcqnircs closeattention, as. a slight increaseof heat will aii'ect the material to be vulcanized, and hence dentalrubber is often brittle, and its value impaired.

The same principle and device will apply to ovens,.

where uniform heat is required.

The device, and the application of mercury for this purpose, is novel,and of great practical utility.

1 claim 1. The application of the expansion of mercury to regulatetheheat in vulcanizing rubber, or its equivalent, for dental purposes,substantially as shown.

2. The use of mercury, by expansion, to'rcgulatc the heat of ovens,where uniformity of heat is required, in combination with the device 0,constructed substantially as shown, and for the purpose specified.

JOHN B. OOOLIDGIL- Witnesses:

A. LESLIE, J. L. Nuw'ros.

